Chaeles iimsch



rrnn STATES ATENT rricn.

CHARLES I-IIRSCH, OF BUFFALO, NEWV YORK, ASSIGNOR OF ONEI-IALF TO JAMES J. LANZ, or SAME PLACE.

STOP- -COCK.

SPECIFICATION forming" part of Letters Patent No. 288,887, dated August .28, 1883.

Application filed February 23, 1883.

city of Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Stop-Cocks, of which the following is a specification.

This invention relates to an improvement in that class of stop-cocks which are employed in the service-pipes of buildings and in other 10 cations for the purpose of shutting off the supply of liquid from the pipe beyond the cock when desired, and at the same time permitting the escape of the liquid from the pipe from which the liquid has been shut off. Stop- I 5 cocks of this character are generally provided with a small passage, which is opened when the main passage of the cock 'is closed, and through which the liquid escapes from the pipe. In order to determine the proper position of the cock when open or closed, such cocks have been provided with a stop, which limits the turning movement of the plug of the cock to a quarter-turn of the cook, or thereabout. These stops have generally been ar- 2 5 ranged on the outside of the plug, and are liable to fill up with dirt, whereby the adjustment of the cock is often rendered difficult.

The object of my invention is to so construct the cock that the stop, whereby this movement is limited, is fully protected and maintained in its proper working condition, and also to provide a simple means for the escape of the liquid when the cock is closed.

My invention consists of the particular con 3 5 struction of the cock, which will be hereinafter fully set forth, and pointed out in the claims. In the accompanying drawings, Figure 1 is a sectional elevation of a stop-cock provided with my improvements. Fig. 2 is an end elevation of the cock with the screw-nut and washer removed from the plug. Fig. 3 is a horizontal section in line 00 m, Fig. 2, with the nut and washer in position. Fig. 4 is an inside view of the washer.

Like lettersof reference refer to like parts in the several figures.

A represents the body or casing, and B the conical plug, which is seated in a conical seat in the casing, and intersected by the water-way (No model.)

a thereof in a common and well-known manner.

7) represents the ordinary water-way of the plug, 0 the screw-bolt formed at the small end of the plug B, and d a flattened or polygonal shank arranged between the inner end of the screw 0 and the small end of the plug in a wellknown manner.

0 represents that portion of the casing which surrounds the small end of the plug B, and 1" represents a segmental groove formed in the face of the portion 0 of the casing concentric to the plug B.

G represents a washer, which is interposed between the portion 6 of the casing and a screw nut, h, applied to the screw-bolt in a wellknown manner. The washer G is fitted on the shank (I, so as to turn with the plug in the usual manner. I

1 represents a pin or projection formed on inner side of the washer G in such a position as to project into the groove f and rest against one end of the groove when the cock is opened, thereby restricting the movement of the plug to a quarter-turn, or thereabout. The washer G covers the groove f and protects the same against dirt, and retains the stop 1nechanism in its proper working condition.

j represents an auxiliary chamber formed in the plug B and opening at its inner end into the water-way of the casing, and extends outwardly to the end of the screw 0, as clearly shown in Fig. 1. The inner opening of the water-way a is arranged at a quarterturn from the main water-way of the plug 13, so that the auxiliary water-way j is in communication with the water-way a of the casing when the cock is closed, as represented in Fig. l, and is closed by the side walls of the casing when theunain water-way Z) of the plug is opene'd. This construction of the auxiliary water-way is very simple, as the water-way can be cast in the plug and lies wholly within the plug, thereby doing away with the necessity of perforating the casing.

I claim as my invention 1. In a stop-cock, the combinatiomwith the casing A, provided with a segmental groove, f, of a plug, B, and washer G, covering the groove f, and provided with a projection, I, entering said groove, substantially as set forth.

2. The combination, with a casing, A, having a segmental groove, f, of a plug, 13, having a Water-Way, b, and an auxiliary Water-Way, j, extending from the Water-Way of the casing to the end of the plug, a Washer covering the' groove f, and provided with a projection on tering the groove, and a screw, 0, and nut h, substantially as set forth.

- CHARLES HIRSOH. Witnesses: JNo. J. BONNER, CHAS. F. GEYER. 

